Double-acting- pump



E. A. JEFFERY.

Double Acting Pump.

No. 13,007. Patented June 5, I855.

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25 attached thereto.

35 the interior of the cylinder.

UNITED STATES PATENT OFFICE.

EDWIN A. J EFFERY, OF CORNING, NEW YORK.

DOUBLE-ACTING PUMP.

Specification of Letters Patent No. 13,007, dated June 5, 1855.

said drawing being a vertical longitudinal section of my improved pump.

The nature of my invention consists in the employment or use of atubular piston provided with a ball valve arranged and operating as willbe hereinafter shown and described. And also in the peculiar mode ofconnecting or attaching the air chamber to the cylinder of the pump aswill be hereafter fully explained.

To enable others skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, represents the cylinder of the pump, B, is the piston rod, and C, isthe piston The piston is formed of a tube having a flanch or head(a),'(a), at each end which is fitted snugly within the cylinder bymeans of suitable packing or otherwise. Within the tube there is fitteda ball D, which works between two shoulders or seats (6) (b), apertures(a) (0) being made through the tube, one below and one above the ball.Both ends of the tube of the piston C, are open and communicate with Theball D, I being at the center of the tube as shown in the drawings.

E, is a longitudinal tube or pipe which communicates with both ends ofthe cylin- 40 der A, at each side or end of the piston C,

to the center of this tube or pipe A, suction pipe F, communicates. Atthe points of junction of the ends of the tube or pipe E, with thecylinder, valves G, are placed, one

at each end of the pipe or. tube E.

H, is an air chamber secured to the upper side or part of the cylinderA, and I, is the force pipe within the air chamber and its lower end isscrewed into the upper part or side of the cylinder A. The upper end ofthe force pipe is provided with a shoulder (d) which rests or bears uponthe upper end of the air chamber.

It will be seen that the air chamber is firmly secured to the cylinderA, by the force pipe, and the force pipe is also rendered firm as it hastwo bearings one at the top of the air chamber and the other at itsjunction with the cylinder.

The operation of the pump will readily be seen, suppose the piston to bemoving in the direction of arrow 2, and the water in front of the heador flanch moving into the interior of the tube of the piston and throughthe apertures (0) (a) into the force pipe I, as indicated by arrows 1.The ball D, bearing, in consequence of the pressure of the water againstthe shoulder or seat (6) and as the piston moves and forces the waterout of one end of the cylinder a suction is of course formed in theopposite end and the water rushes up through the pipe F, and opens theproper valve G, the other valve G, being closed by the pressure of thewater, as they open upward. l/Vhen the piston returns, the ball isforced against the opposite shoulder or seat (1)) and the water that waspreviously drawn up in the cylinder, as the piston moved in thedirection of arrow 2, is forced out of the cylinder. Thus a continuousstream of water is thrown and the construction of the pump rendered eX-tremely simple and durable.

I do not claim merely substituting ballvalves, for other kinds ofvalves, in a tubular piston with valve seats at its ends but lVhat I doclaim is 1. Connecting the piston heads by a long tube, having a shortvalve-chamber near its middle, with a single ball valve, the waterpassing alternately through each end of the tube, and out at the sidesof said valvechamber-the valve chamber being so short that the ball willexclude the water from one end, by rolling only far enough to admit thewater fairly at the other, while the piston heads are so far apart thatthe eduction port shall always be embraced between them, substantiallyas set forth.

2. I claim securing the air chamber H, to the cylinder A, by means ofthe force pipe I, as herein described, whereby the air chamber is firmlysecured to the cylinder and the force pipe firmly supported.

EDWIN A. J EFFER-Y.

Witnesses:

